Figure 1
From: Formation of metallic magnetic clusters in a Kondo-lattice metal: Evidence from an optical study

Structure and long-range magnetic order in Tb2PdSi3.
(a) A simplified unit cell of Tb2PdSi3, neglecting the c-axis superstructure. (b,c) ab-plane and c-axis magnetic ordering patterns according to the results of neutron scattering study15.